This part is a kind of semiconductor called B1370.

Function of this product has 2SB1370.

Manufacturers : ROHM Electronics

Image and pinout :

Some of the text within the PDF file :

Transistors 2SB1370 2SB1655 / 2SB1565 (94L-411-B303) (94L-456-B349) 319 [ ... ]

B1370 PDF Datasheet Download